In the field of wind power blades, PVC structural foam material has the characteristics of high strength, high rigidity, high temperature resistance, good mechanical properties, low water absorption and good sound and heat insulation effect, and is the core material of wind power blades. Core materials are usually installed at the leading edge, trailing edge and web of the blade, and sandwich structure is generally used to increase the structural stiffness, prevent local instability and improve the load resistance of the whole blade. With the development demand of large-scale wind turbine blades, high production efficiency and low cost, PVC structural foam with high strength, high temperature resistance and low resin absorption has become an important direction of industry development.